Abstract

Identity theorists make claims like ‘pain = C-fibre stimulation’. These claims must be necessary if true, given that terms like ‘pain’ and ‘C-fibre stimulation’ are rigid. Yet there is no doubt that such claims appear contingent. It certainly seems that there could have been C-fibre stimulation without pains or vice versa. So identity theorists owe us an explanation of why such claims should appear contingent if they are in fact necessary.